An Intelligent Rapid Dynamic Hybrid Reactive Power Compensation System

Abstract

The invention discloses an intelligent quick dynamic hybrid reactive compensation system. The intelligent quick dynamic hybrid reactive compensation system comprises a sampling unit, a knife-switch unit, a general-control unit, a switching switch unit and reactive compensation units, wherein the sampling unit is used for sampling current signals and voltage signals of a power line, the knife switch unit is used for connecting the reactive compensation units into the power line, the general control unit calculates required reactive compensation quantity of the power line according to the current signals and the voltage signals acquired by the sampling unit from the power line, and controls the switching switch unit to get through the corresponding reactive compensation units to reactively compensate. In the intelligent quick dynamic hybrid reactive compensation system, the required reactive compensation quantity is determined according to practical conditions of the power line, and can adapt to places where reactive power changes quickly by sequentially adopting three-phase compensation and single-phase compensation, unbalanced three-phase degree and power factors are improved, and the service life of electric equipment is prolonged.

Description

technical field [0001] The invention relates to a reactive power compensation system, in particular to an intelligent fast dynamic hybrid reactive power compensation system. Background technique [0002] In the power supply system, excessive reactive power will directly affect the power factor, thus wasting electric energy. Therefore, reactive power compensation devices are installed in the power supply system. [0003] The existing reactive power compensation device uses a single-phase voltage signal, and uses an AC contactor as a switching switch to control the simultaneous input or withdrawal of capacitor banks. This kind of control method has many disadvantages, for example: due to the use of single-phase voltage signal, the implementation of reactive power compensation is not accurate enough. Especially when the three phases are unbalanced, if it is judged whether the capacitor bank is switched or not based on a certain phase signal, it will cause over-compensation or...

AI Technical Summary

Problems solved by technology

This control method has many disadvantages, for example: due to the use of single-phase voltage signals, the implementation of reactive power compensation is not accurate enough

Especially when the three phases are unbalanced, if it is judged whether the capacitor bank is switched or not based on a certain phase signal, it will cause over-compensation or under-compensation of a certain phase; moreover, since the capacities of the capacitors in the capacitor bank are equal, it is impossible to select the appropriate capacitor for Reactive power compensation; in addition, it is also easy to shorten the life of the capacitor bank due to the inability to eliminate grid harmonics

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